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Finding the Fourth Proportional to 662,553.72, 992,576.70 and 391,871.16

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Solution

The fourth proportional to 662,553.72, 992,576.70 and 391,871.16 is: 587,065.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,553.72 : 992,576.70 = 391,871.16 : x
  2. Step 2: Convert to fraction form
    662,553.72/992,576.70 = 391,871.16/x
  3. Step 3: Cross multiply
    662,553.72x = 992,576.70 × 391,871.16
  4. Step 4: Simplify right side
    662,553.72x = 388,962,182,817.97
  5. Step 5: Solve for x
    x = 388,962,182,817.97/662,553.72
  6. Step 6: Final answer
    x = 587,065.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.